how far have you got?
have you got the retaining nut free? after this is done there is the metal collect that sits on the end of the track rod end and is secured by the retaining nut?
to remove the nut, clean up with a wire brush, spray with PTE fluid, leave it and have a good go at it, if still no good then heat it all right up with a gas burner and becare full not to burn the CV boot, then place a hammer under heather and bang a hammer on top, (dificult to explain, basicaly, 2 hammers, one held against the bottom of the bar the other hitting the top, it really works,
to remove the collet, put a spanner the fits over the bar but not over the collet, then wack it with a hammer,
dont lose the collet or damage the nit because they come as part of thje steering rack and cant be bought seperatly!